am a5cd816c: am eb9128f9: Fix sampleTable instantiation, this makes sure that the sample table refers to the custom datasource that caches the metadata to prevent needless seeking.

Merge commit 'a5cd816c720ed87b91a33aa5d000a0d308c74453' into kraken

* commit 'a5cd816c720ed87b91a33aa5d000a0d308c74453':
  Fix sampleTable instantiation, this makes sure that the sample table refers to the custom datasource that caches the metadata to prevent needless seeking.